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Answers.everydaycalculation.com » Compare fractions

Compare 70/90 and 21/20

1st number: 70/90, 2nd number: 1 1/20

70/90 is smaller than 21/20

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    70/90 = 70 × 2/90 × 2 = 140/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    21/20 = 21 × 9/20 × 9 = 189/180
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 140/180 < 189/180 or 70/90 < 21/20

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